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/* Test of <math.h> substitute.
Copyright (C) 2007-2022 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
#include <config.h>
#include <math.h>
#ifndef NAN
# error NAN should be defined
choke me
#endif
#ifndef HUGE_VALF
# error HUGE_VALF should be defined
choke me
#endif
#ifndef HUGE_VAL
# error HUGE_VAL should be defined
choke me
#endif
#ifndef HUGE_VALL
# error HUGE_VALL should be defined
choke me
#endif
#ifndef FP_ILOGB0
# error FP_ILOGB0 should be defined
choke me
#endif
#ifndef FP_ILOGBNAN
# error FP_ILOGBNAN should be defined
choke me
#endif
#include <limits.h>
#include "macros.h"
#if 0
/* Check that NAN expands into a constant expression. */
static float n = NAN;
#endif
/* Compare two numbers with ==.
This is a separate function because IRIX 6.5 "cc -O" miscompiles an
'x == x' test. */
static int
numeric_equalf (float x, float y)
{
return x == y;
}
static int
numeric_equald (double x, double y)
{
return x == y;
}
static int
numeric_equall (long double x, long double y)
{
return x == y;
}
int
main (void)
{
double d = NAN;
double zero = 0.0;
ASSERT (!numeric_equald (d, d));
d = HUGE_VAL;
ASSERT (numeric_equald (d, 1.0 / zero));
ASSERT (numeric_equalf (HUGE_VALF, HUGE_VALF + HUGE_VALF));
ASSERT (numeric_equald (HUGE_VAL, HUGE_VAL + HUGE_VAL));
ASSERT (numeric_equall (HUGE_VALL, HUGE_VALL + HUGE_VALL));
/* Check the value of FP_ILOGB0. */
ASSERT (FP_ILOGB0 == INT_MIN || FP_ILOGB0 == - INT_MAX);
/* Check the value of FP_ILOGBNAN. */
ASSERT (FP_ILOGBNAN == INT_MIN || FP_ILOGBNAN == INT_MAX);
return 0;
}
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